Product/Service

Steam Conditioning Valves

Source: BTG, Division of Spectris Technologies Inc.
The VST-SE mini valve is primarily used in industrial and utility power plants for the conditioning of auxiliary and process steam
BTG, Division of Spectris Technologies Inc.ini

  • Very high rangeability
  • Direct cooling water proportioning
  • Long service life with low maintenance requirements
  • Customized for each specific application
  • A high quality temperature and pressure control element
  • Simple design for high availability

    Applications
    The VST-SE mini valve is primarily used in industrial and utility power plants for the conditioning of auxiliary and process steam. It is especially suited for lower capacity requirements and can yet provide a very high rangeability.

    Design
    The steam flow is throttled through a contour valve plug guided in a cage with throttling holes. This system provides optimum steam pressure control characteristics for the valve. The plug moves in a hard-faced (nitrided) cage, uncovering a greater or smaller number of the throttling holes.

    When the valve is closed, the nitrided plug seating surface seals against the hard-faced seat, thus providing excellent sealing characteristics as well as superior resistance to erosion and thermal fatigue.

    The seat body is designed as a field-replaceable component.

    The plug is connected to its actuator by a straight stem of a material resistant to heat and corrosion. Precompressed sealing rings of expanded graphite are used for the stem sealing.

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